Bri 1 pulse support

[JoeRoddy]

This PR:

• adds the ability to use a websocket server for handling Bridg requests

  • can be configured simply by passing a ws url as your generator api:

  generator bridg {
    api = "ws://localost:3000/api/bridg"
    pulse = true
  }

• adds support for the Prisma pulse extension, for listening to realtime data changes. to use this feature, you must:

  • use a websocket api
  • pass pulse = true in the bridg generator
  • extend your prisma client with pulse before passing it to Bridg for handling an incoming request:

  const db = new PrismaClient().$extends.withPulse({ apiKey: PULSE_API_KEY })) as unknown as PrismaClient;

An example socket server implementation can be viewed here:
https://github.com/JoeRoddy/pulse-chat-demo/blob/main/src/pages/api/socket.ts

In the future, I would like to simplify this to hide some of these complexities of managing subscriptions and replying to websocket messages.

• adds a test suite to validate pulse subscriptions obey Bridg rules